Weft stop motion for looms



Dec. v 1,5129% W. S. WELLS WEFT STOP MOTION FOR VOMS Filed Nov. 11, 1922 4 Sheets-Sheet 1 d I W? k Mal -3W; n

ATTORNEY nee, 2, 1924. 1,517,929 W. S. WELLS WEFT STOP MOTION FOR LOOMS 4 Sheets-Sheet 6 Filed Nbv. 11, 1922 Dec. 2, 1924. v W. S. WELLS WEFT STOP MOTION FOR LOOMS Filed Nov, 11,-1922 4 Sheets-Sheet 5 A 1 INVENTOR Dec. 1924- 1,517,929

' W. 5. WELLS NEFT STOP MOTION FOR LOOMS Filed Nov, 11, 1922 4 Sheets-Sheet 4 w/r/vfss INVENTOR WiHmm iwens,

' shifts WILLIAM s. WELLS, or scorn MIN nasrwoon COMPANY, JERSEY.

BETHLEHEM, PENNSYLVANIA, ASSIGNOR TO BENJA- OF PATTERSON, NEW JERSEY, A CORPORATION NEW \VEFT STD]? MOTION FOR LOOMS.

Appligation filed November 11, 1922 To all 10710211 it may concern:

Be it known that citizen of'the United Bethlehem, in the county of Lehigh State of Pennsylvania,

1, XVILLIAM S. VELLS, a States, residing at South and have invented certain new and useful Improvements in Weft Stop Motions for Looms, of which the following is a specification.

This invention relates to mechanisms for looms and tain improvements, the batten which detects the absence of or filling and thereupon weft stop in otion it consists in cerfirst, in the means on weft transmits the motion of the batten to movable means which the loom controller to position for stoppin the loom and, second, in the said O a means which shifts the 100m controll the stopping position,

er tothe principal objects being to provide a weft-stop motion mechanism which may be used as acenter motion mechanism, and adapted to be inoperative of the loom absence of filling (that is, until the following starting up can ing in operative relation to the dete means, under its weft-fork), further, shall permit a loom to at higher speed than is possible with stop as such shall be to cause stopping for the first pick following and consequent stopping shuttle on its second shot have laid the fillctingand which, be drivenprevious mechanisms of this class and yet perform its functions reliably.

Fig. 1 is a fragmentary of a loom embodying my invention breast beam and'parts away to show certain other parts clearly;

Fig. 2 is a view on a front elevation the thereon being broken larger scale showing the breast-beam and batten and the improved mechanism in plan;

Fig. 3

shows the breast-beam and batten in section and my mechanism in side elevas tion with the parts thereof in the positions they occupy when the batten is back;

Figs. 4, 5 and 6 are similar views but respectively showing said mechanism with the parts thereof positioned as follows, to wit, when the loom 18 about to be stopped on absence of filling; when the loom has stopped, the batten when the loom has been the batten is performing its first for movement thereafter;

having gone back;

again started and been ward

and

Serial No. 600,263.

Fig. 7' is a plan of the batten and that portion of the mechanism which is mounted thereon;

Fig. 8 Fig. 7;

Fig. 9 is a plan, partly in section, of a certain weftforkforming member and the means for effecting adjustment thereof; and

Figs. 10 and 11 are detail views of the weft-fork.

Let a and I) represent the knock-off shaft and handles therefor of the loom, said shaft being suitably journaled in the sides of the loom frame A in the usual way. The structure a Z) I herein term the controller of the loom and to that end it may be assumed, for example (suitable means, not shown, being. provided for driving the loom and incidentally reciprocating the batten toward and from thebreast-beam), that said lever controls braking means for the lOUlll (as in the Zeedyk Patent No. 1,360,487), the brake being released when the controller stands as in Figs. 3, 4iand 6 but applied when the controller standsas inFig. 5.

c is the breast-beam and d is the batten.

A bracket e is secured to the front face of the batten, the same being channeled at the front and having its upper portion slotted as at c (Fig. 2), for the play up and down in its slot of a weft-fork f pivoted in the bracket and having a hook f projecting forwardly and downwardly. The weft-fork also has projecting dowrr wardly therefrom a stud f to which is connected one end of a spiral spring g, which tends to hold the weft-fork normally dopressed, being for that purpose attached to the crank it on one end of a rod h which at its, other end has acrank h for rotatively adjusting it in its bearings 2' and j, the former of which is a screw axially bored to receive the rod and is tapped into one side of the bracket 6 and the latter of which is a clip attached to the batten and having is a sectional view on line 8 8,

a screw y" to cause it to clamp the rod and.

which the weft-fork presses at the recess 70- (Fig. 2) in the batten. In bearings at the lower end of the bracket 6 is journaled the shaft Z of a dagger or dagger structure which includes the dagger proper a, secured on said shaft by the set-screw a, a catcharm in, set fast in a transverse hole in the shaft and having its free end bent off as at m (Figs. 7 and 8) and a split wiper arm 0 clamped on the shaft by a set-screw 0 and having a rounded under surface 0 The dagger and weft-fork coact reciprocally thus: Each time the former swings up, or counter-clockwise, the end m of its catcharm bears against the shank of the hook f and elevates the weft-fork; when it swings down it allows the weft-fork to drop and, if there is failure of filling and the weft-fork can thus enter slot 70, the hook-proper f on hook 7 will engage end m of the catch-arm (since they move in intersecting arcs shown dotted in Fig. 4) and stop the movement of the bell-crank lever, which otherwise continues moving to a further limit. Means is provided for causing upward movement of the dagger, when the batten recedes and the weftfork is to rise to permit the shuttle to pass, and its downward movement, when the batten moves forward and the weft-fork is to feel for the filling, as follows: The latter movement is caused by a spring 79 interposed between the butt of the dagger proper and the bracket 6, gravity of course is also a factor in this, so I do not wish to be limited to the use of means, such as this spring. The former or upward movement is caused by the wiping of a roller Q against the rounded under surface 0 of the wiper-arm 0, the roller being carried by a lever r pivoted in bracket 6 on a stud s and having its free end pivotally connected to a link 6 which is in turn connected (preferably by being pivoted to a stud u) with some fixed part, as the bracket o secured to the under side of the breast beam and incidentally forming a center bearing for the knockoff shaft; forward and backward adjustment of the stud a is possible by arranging it in a slot 10 in said bracket.

On the knoclooif shaft a collar m is secured by a set screw y, the same having a depending web On the pin 2 in this web is fulcrumed a toggle lever 3 which has a spring 4L connecting it at one side of its fulcrum with a pin 5 on the web at the opposite side of its fulcrum, said lever being movable between limits determined by the stops 6 and 7 in such manner that when it bears against one or the other stop the point at which the spring is connected to the lever will be at one side or the other of a straight line passing through the points 2 and 5. The end of the lever adjoining the batten has a notch 8 to receive the impact of the end of the dagger; if (the lever being in the position shown in Fig. 4) it is impinged by the dagger and so causes the controller to rock from the position shown in Fig. l to that shown in Fig. 5, the other end of the let er will be brought against a spring secured in bracket 11 and thus shifted from contact with stop 7 to contact with stop 6, clearing the dagger. The latter end of the lever 8 has an underneath cam face 10 adapted to be impinged by the dagger. The web is formed with a camming shield 11 present only to fend the dagger downwardly if, through improper adjustment or some other fault, its free end should in its knocking-off thrust stand too high.

0pemti0m-The reciprocal coaction of the weft-fork and dagger has been already explained. If there is failure of filling or weft, on the ensuing forward movement of the batten the dagger will be checked in its downward o1- clockwise movement by the weft-fork hook f and, being held in the position of Fig. 4, will impinge against the notched end of lever 3 and through the latter rock the controller to the position of Fig. 5, the lever being shifted by spring 9 clear of the dagger or to idle position. The loom will thus be stopped, the batten coming to a standstill at about the position shown in Fig. 5. When, upon shifting the controller tothe position of Fig. 6, the loom is again started, since there is still (on the first forward movement of the batten) failure of filling, the dagger will be again caught and held by the weft-fork hook f in the position shown in Fig. 4; but, since lever 3 is still in the idle position, the dagger will clear its notched end and so not effect a second shifting of the controller (Fig. 6) but it will, however, engage its cam face 10 and so rock it back to active position, ready to act to cause shifting of the controller on failure of filling on the next or any succeeding forward movement of the batten.

When the weft-fork in descending about reaches the feeling position the stroke is normally (i. e., if filling is present) con tinued without the dagger having any further influence on the weft-fork. Thus, since the mass represented by the dagger (and necessary for the latter to perform its work of knocking-off) is not a factor to be considered in determining and applying to the weft-fork the force which is required to effect the feeling, it is possible to use a very light spring, as g, to afford this force; previous constructions, on account of the dagger continuing to influence the weft-fork in the acutal feeling part of its stroke, required springs strong enough to control the daggers mass and it was practically impossible (especially in high speed looms) to obtain such nice adjustments that the weftfork would not either fail to detect or would detect prematurely and cause what is known as looping of the filling. Again, since in the descent of the weft-fork and dagger the latter either is caught and held by the former positively at a given elevation or allowed to proceed on to a lower one entirely independently of any further movement of the weft-fork, it is possible to construct the parts so that the dagger will always strike a clean square blow in knocking-off, or clear completely, and the mechanism is prevented from becoming unreliable in action as the result of the marring of the impact faces that glancing blows produce.

The spring 9 acts on an eccentric point (in arm of the weft-fork to turn it on its axis to a definite position, and when it is in this position it is in or approximately in the feeling portion of its range of movement, or that part of its downward movement where it is about to enter recess a. The force represented by the spring is therefore desirably less in the feeling part of the stroke than when the weft-fork is raised, when the spring should insure the descent of the weft-fork, when that occurs, as fast as the descending dagger will permit. The dagger is made to rise at a speed which is gradually accelerated and fall at a speed which is gradually retarded (which involves smoothness and reliability in the action of the parts) by forming the surface 0 in a suitable cam-like curve; but at the end of the wiper-arm this curve becomes the arc of a circle of such radius that when the roll er (1 rolls in contact with this part of the surface (which is when the dagger and hence the weft-fork are fully up) the weftfork stands at dwell thus to afford time for the shuttle to pass.

The device 71 forms a simple and convenient means for adjusting the pressure of a weft-fork on the filling or Weft, whether the weft-fork is acting, as here, as a detector in a stopmotion mechanism or otherwise.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In combination, with the fixed structure of a loom and a batten-including structure movable in the fixed structure back and forth, a weft-detecting device pivotally movable on the second structure into and out of and normally urged into position to detect failure of weft on said second structure, a dagger pivotally movable on said second structure in one direction against said device to move it out of said position but normally urged in the opposite direction, said device and dagger having their axes of movement parallel, means to press the dagger against said device on each back and forth stroke of the second structure, said device having means to check movement of the dagger in said opposite direction on failure of weft and consequent movement of said'device into said position, and a shiftable loom-controller-including means arranged to be shifted by the dagger.

2. In combination, with the fixed struc ture of a loomand a batten-including structure movable in the fixed structure back and forth, a weft detecting device pivotally movable on the second structure into and out of position to detect failure of weft on said second structure, a spring yieldingly holding said device in said position, a dagger pivotally movable on said second structure in one direction against said device to move it out of said. position but normally urged in the opposite direction, said device and dagger having their axes of movement parallel, means to press the dagger against said device on each back and forth stroke of the second structure, said device having means to check movement of the dagger in said opposite direction on failure of weft and consequent movement of said device into said position, and a shiftable loom-controller-including means arranged to be shifted by the dagger.

3. In combination, ture of a loom and a with the fixed strucbatten-including structure movable in the fixed structure back and forth, a weft-detecting device movable on the second structure into and out of and normally urged into position to detect failure of weft on'said second structure, a dagger pivotally movable on said second struc' ture in one direction against said device to move it out of said position but normally urged in the opposite direction, means including a lever to press the dagger against said device on each back and forth stroke of the second structure, said lever and (lag ger having their axes of movement parallel and one having a cam to wipe against th other and said device having means to check movement of the dagger in said opposite direction on failure of weft and consequent movement of said device into said position, and a shiftable loom-controller-including means arranged to be shifted by the dagger. 4. In combination, with the fixed part and the back-and-forth movable batten-including structure of a loom, a weft-stop motion mechanism including a loom-controller-in-- eluding means shiftable in said fixed part of the loom, a dagger member pivotally movable on said structure into and out of position to engage and shift said means, and a weft-detecting {device movable in said structure by the dagger out of detecting relation to the weft and normally urged into said relation and controlling the movement of the dagger to its said position, said mechanism also including a lever member for anoving the dagger member out of said po sition fulcrumed in said structure on an axis parallel with the axls of movement of the dagger and operatively connected with the fixed part of the loom to be moved thereby and one of said members having a camming engagen'ient with the other.

5. In combination, With the fixed structure of a loom and a batten-including struc ture movable in the fixed structure back and forth, a Web detecting device pivotally movable on the second structure into and out of position to detect failiiire of Weft on Said second structure, means, including a pivoted dagger and movable back and forth on said second structure, for moving said device into and out of said position, said device and dagger having their axes of movement parallel and said device having means on failure of filling to maintain the dagger at standstill in and relatively to said second struc ture, and shiftable loom-controller-including means arranged to be shifted by the dagge 1 when the latter is at such standstill.

6. In combination, with the fixed structure of a loom and a batten-including structure movable in the fixed structure back and forth, back and forth shiftable controller including means on the first structure, said means having a stop, a lever movable on said means back and forth from and to and normally abutting the stop, weft-controlled means on the second structure having a dagger movable to a definite position in the sec- 011d structure and thereupon adapted to engage a part of said lever and through the lever shift the first means, and means arranged in the path of movement of the lever with the first means on shifting of the latter, to move the lever clear of the dagger.

7. In combination, With the fixed structure of a loom and a battenincluding struc ture movable in the fixed structure back and forth, back and forth shiftable controllerincluding means on the first structure, said means having a stop, a lever movable on said means back and forth from and to and normally abutting the stop, Weft-controlled means on the second structure having a dag ger movable to a definite position on the second structure and thereupon adapted to engage a part of said lever and through the lever shift the first means, and means on such shifting of the first means to move the lever clear of the dagger, said lever on shifting of the first means back again having another part thereof projecting into the path of movement of said dagger When in said position and the lever being thereby adapted to be returned by the dagger into contact With said stop.

8. In combination, With supporting means on Which the Weft is laid, a pivoted Weftfork movable toward and from the Weft laid on said means, a spring connected to an eccentric point of the weft-fork, and an adjusting member for the spring rotatively adjustable in said means and having the spring connected to an eccentric point thereof.

In testimony whereof I afiix my signature.

WILLIAM S. WELLS. 

